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Wireless ic tag, wireless ic tag system and operation method for wireless ic tag

A label operation and wireless technology, applied in the field of wireless IC label system, can solve the problem of increasing the number of tuning and capturing parts, and achieve the effect of simple structure

Inactive Publication Date: 2009-05-06
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to cope with various frequency bands, the tuner capture unit, the frequency conversion unit, and the number of components described in Patent Document 1 increase.

Method used

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  • Wireless ic tag, wireless ic tag system and operation method for wireless ic tag
  • Wireless ic tag, wireless ic tag system and operation method for wireless ic tag
  • Wireless ic tag, wireless ic tag system and operation method for wireless ic tag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] figure 1 The basic structure of Embodiment 1 of the wireless IC tag system of this invention is shown. exist figure 1 Among them, B1 represents a wireless IC tag, B2 represents a reader / writer (wireless communication device), and B3 represents a high-frequency signal output device (wireless signal output device). The read / write device B2 has an output circuit B4 composed of an antenna and an antenna drive circuit, and outputs a high-frequency signal P1. In addition, the high-frequency signal P1 is superimposed with an information signal for causing the reader / writer device B2 to read data stored in the wireless IC tag B1, an information signal for causing the reader / writer device B2 to write data into the wireless IC tag B1, and the like. The high-frequency signal output device B3 has an output circuit B5 constituted by an antenna and an antenna driving circuit, and outputs a high-frequency signal P2. The high-frequency signal P2 is a signal output during the period ...

Embodiment approach 2

[0069] Figure 5 The basic structure of Embodiment 2 of the wireless IC tag system of this invention is shown. exist Figure 5 Among them, B1 represents the wireless IC tag, B2 represents the reading and writing device, and B3 represents the high-frequency signal output device.

[0070] The wireless IC tag B1 receives the high-frequency signal P1 supplied as radio waves from the reader / writer device B2 and the radio-frequency signal P2 supplied as radio waves from the high-frequency signal output device B3. Also, the information signal superimposed on the high-frequency signal P1 is demodulated, the result of signal processing based on the information signal sent from the reader / writer B2 is superimposed on the high-frequency signal P1, and returned to the reader / writer B2.

[0071] The read / write device B2 has an output circuit B4 composed of an antenna and an antenna drive circuit, and outputs a high-frequency signal P1. In addition, the high-frequency signal P1 is superi...

Embodiment approach 3

[0075] Image 6 The basic structure of Embodiment 3 of the wireless IC tag system of this invention is shown. Figure 7 express Image 6 A diagram showing an example of the control waveforms of the high-frequency signals P1 and P2 of the wireless IC tag system shown. exist Figure 7 Among them, (A) represents the high-frequency signal P1 output by the reader / writer B2, (B) represents the control signal S2 output by the radio wave detection circuit B13, and (C) represents the high-frequency signal P2 output by the high-frequency signal output device B3a.

[0076] exist Image 6 Among them, B1 represents a wireless IC tag, B2 represents a read-write device, and B3a represents a high-frequency signal output device.

[0077] The read / write device B2 has an output circuit B4 composed of an antenna and an antenna drive circuit, and outputs a high-frequency signal P1. In addition, the high-frequency signal P1 is superimposed with an information signal for causing the reader / writ...

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Abstract

A wireless IC tag system according to the present invention is provided with a wireless IC tag, a reader / writer device and a high-frequency signal output device. The reader / writer device outputs a first high-frequency signal. The high-frequency signal output device outputs a second high-frequency signal only during a period when the reader / writer device outputs the first high-frequency signal. The wireless IC tag is provided with an antenna, a power supply circuit and a communication circuit. The antenna receives the first and second high-frequency signals. The power supply circuit generates a power supply voltage from the first and second high-frequency signals. The communication circuit transmits and receives an information signal to and from the reader / writer device by utilizing the first high-frequency signal.

Description

technical field [0001] The present invention relates to a wireless IC tag (tag) system for transmitting and receiving data between a wireless IC tag attached to an article and the like and a read / write device. Background technique [0002] The wireless IC tag with built-in IC chip and antenna is used to exchange information between the read-write device and the IC chip, to store the data sent from the read-write device and to send the data stored in the wireless IC tag. This wireless IC tag system is used in product management and inbound and outbound management in production lines and logistics warehouses. [0003] In a passive wireless IC tag without a built-in battery, an antenna receives a high-frequency signal supplied from a reader / writer, and generates an internal voltage necessary for internal circuit operation from the high-frequency signal. [0004] A certain amount of information transmission distance can be ensured from the reader / writer device to the wireless I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/07G06K7/00H04B5/48
CPCG06K19/0723G06K7/0008G06K19/07767Y02B60/50G06K19/0707
Inventor 渡边一希山本正明山添孝德
Owner HITACHI LTD